They attempted to use it as a monoprop, where you pump it over a platinum screen to catalyze it. This is attractive because it avoids any issues with mixing. T

They attempted to use it as a monoprop, where you pump it over a platinum screen to catalyze it. This is attractive because it avoids any issues with mixing. They had extreme difficulty sourcing anything but dilute hydrogen peroxide. The few manufacturers refused to sell to them once they discovered the application. I think they ultimately bought a distillation unit made by a man involved in rocket powered drag racers in Mexico. Ultimately, I think the higher specific impulse of fuel+oxidzer two part systems justified the added complexity and they abandoned monoprops. As other's have noted, at 3% concentration hydrogen peroxide is pretty benign. At 60% it is quite dangerous. Armadillio Aerospace was exploring 90%+ concentrations.